Design And Calculation Of Loads For Marine Pipeline System

The investigation of ship pipeline system design and load calculation is one of the important technological problems for ship and marine platform. The load sorts of pipeline is determined and the method calculating the load is also studied, the general design method and standard of pipeline system and seven representative pipeline systems of marine drilling platform are introduced. The classical waterpower computing method and Computing Fluid Dynamics (CFD) method are adopted to study the fluid load of pipeline firstly. Then mechanics of materials and hydrodynamics are applied to study the outer load of pipeline system. Lastly the Finite Element Method (FEM) is applied to analysis and checking the strength of pipeline. Basic data could be provided much more reasonably to the design for pipeline and supporting structure to guarantee pipeline system optimization design most and run safely, after considering all kinds of loads synthetically.The main aspects of research work are as following:1. A pipeline design method is discussed and the famous American Petroleum Institute (API) pipeline standard is also introduced. According to seven pipeline work principle sketch maps of marine drilling platform, all achieved functions and operated requests of each pipeline system are introduced. Under satisfying the pipeline system work requests, the commonly principle and procedure of pipeline design are summarized.2. The fluid load in pipeline is calculated, that is calculating the pressure distribution of pipeline. The Computing Fluid Dynamics (CFD) method was applied to the numerical simulation calculation for some local region where the boundary changes acutely. The numerical simulation calculation of the local pressure distribution for pipeline was processed by applying the method of RANS equations with the k-e model.3. When calculating wind load, many factors are considered, including wind pressure variety along with altitude, bodily form effect of pipeline structures, adjustment of recurring period and influence of wind vibration.4. Trust force and bending moment result in heat expansion are calculated by adopting beam theory of mechanics of materials and applying force component analysis method.5. Adopting beam theory of mechanics of materials and applying force component analysis method, the rule that the outer load of pipeline result in pipeline supporting structure's motion is renewedly distributed was studied and the design load of pipeline supporting structure was revised.